Cp*Ir complex with mesobiliverdin ligand isolated from Thermoleptolyngbya sp. O-77

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We developed a new method to isolate a natural pigment of mesobiliverdin IXα (MBV) directly from phycocyanin of Thermoleptolyngbya sp. O-77 and synthesized a water-soluble Cp*Ir complex with the isolated MBV ligand. To obtain a high yield of MBV, we modified the conventional method by adding additional two steps: the protease digestion of phycocyanin by trypsin and the isolation of MBV by hydrophobic and silica gel column chromatographies. The Cp*Ir complex with MBV ligand was characterized by electrospray ionization-mass spectrometry, ultraviolet-visible-near-infrared absorption spectroscopy, X-ray photoelectron spectroscopy, 1H NMR spectroscopy, and H–H correlation spectroscopy. This is the first example of a platinum-group metal complex with MBV as a ligand.

Original languageEnglish
Article number122302
JournalJournal of Organometallic Chemistry
Publication statusPublished - Apr 15 2022

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Materials Chemistry


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